Bayern Munich have complained to hosts Olympiakos after Greek police attacked travelling German fans with riot sticks before Wednesday's Champions League match.

At least one injured Bayern fan was transported out of the Karaiskakis Stadium after being hurt in the brief disturbance.

Police intervened with batons after a small group of Bayern fans, some of whom were masked, in the away section of the stadium, openly provoked home fans with taunts and gestures.

The match kicked-off on time, but Bayern have lodged an official complain with the hosts over the incident.